22952821 has 4 divisors (see below), whose sum is σ = 22962412. Its totient is φ = 22943232.

The previous prime is 22952801. The next prime is 22952849. The reversal of 22952821 is 12825922.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4368100 + 18584721 = 2090^2 + 4311^2 .

It is a cyclic number.

It is not a de Polignac number, because 22952821 - 2¹³ = 22944629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22952801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2101 + ... + 7093.

It is an arithmetic number, because the mean of its divisors is an integer number (5740603).

Almost surely, 2^22952821 is an apocalyptic number.

It is an amenable number.

22952821 is a deficient number, since it is larger than the sum of its proper divisors (9591).

22952821 is an equidigital number, since it uses as much as digits as its factorization.

22952821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9590.

The product of its digits is 5760, while the sum is 31.

The square root of 22952821 is about 4790.9102475417. The cubic root of 22952821 is about 284.1921144421.

The spelling of 22952821 in words is "twenty-two million, nine hundred fifty-two thousand, eight hundred twenty-one".